POLYPROPYLENE LINED VALVES (PPL) -10 degrees to +200 degrees F
A general purpose plastic lining with good chemical and temperature resistance. Utilized for water treatment, chemical processing, most plating fluids, steel mill pickling lines, food stuff and drinking water. Generally polypropylene should not be used in contact with strong oxidizing acids, chlorinated hydrocarbons and aromatics.

TEFZEL® LINED VALVES (ETFE) -10 degrees to +300 degrees F
(Ethylene-Tetrafluorethylene) Outstanding resistance to chemicals and strong acids. Also has high abrasion resistance for tough services. Below 350 degrees F has no known solvent.

KYNAR (PVDF) Polyvinylidene Fluoride -10 degrees to +275 degrees F
Offers very low permeability. A strong tough abrasion resistant fluorocarbon material resistant to most acids, bases and organic solvents. It is ideally suited to handling wet or dry chlorine, bromine and other halogens.

RUBBER LINED VALVES
Metal bodies can be lined with soft natural rubber, hard natural rubber, neoprene, ethylene propylene, or hypalon. Typical service and temperature range would be similar to that for diaphragms of the same material.

DIAPHRAGM MATERIALS AVAILABLE

ETHYLENE PROPYLENE (EPDM) -30 degrees to +300 degrees F The most popular general purpose material. Excellent chemical resistance to a wide variety of corrosive elements including acids, caustics and hot water. It is abrasion resistant and good for high temperature service. EPDM has poor oil resistance. It is also satisfactory for intermittent steam sterilization.

NEOPRENE (CR) -20 degrees to +200 degrees F Widely used in wastewater applications. A good choice for general purpose chemical resistance where the media contains entrained oils. It also resists aldehydes, certain alcohols, fertilizers, explosives, petroleum, air, acids, alkalies and is abrasion resistant.

SOFT NATURAL RUBBER (NR) -30 degrees to +180 degrees F
The most abrasion resistant diaphragm. Good in either wet or dry abrasive service, water, some acids and alkalines.

HYPALON® (CSM) 0 degrees to +225 degrees F
Has good resistance to strong oxidizing agents including sulfuric acid. General chemical resistance is similar to neoprene but with only moderate oil resistance. Also good in certain chlorine service, for alkalies and is abrasion resistant.

VITON® (FKM) -20 degrees to +300 degrees F
Offers exceptional resistance to oils, most chemicals and many solvents at elevated temperatures. It can be used in most applications involving mineral acids, salt solutions and chlorinated hydrocarbons. Viton is not recommended for ammonia, its derivatives or polar solvents, E.G. Acetone. Very costly, but sometimes works where others fail.

TEFLON® TFE/EPDM -30 degrees to +300 degrees F
TFE is simply the most chemical resistant of all the diaphragm materials. It is good for handling strong acids, alkalies (caustics) and solvents. Because of its greater stiffness, it significantly increases required closing/sealing forces and on automatic valves may require a larger size actuator and has a shorter working life than elastomer diaphragms.

BUTYL -20 degrees to +250 degrees F
A good choice for gases because it has very low vapor and gas permeability. Also good for many acids and alkalies. Good for applications involving steam sterilization.

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Note: Other "Body Lining Materials" are available as an option. Call our sales department for details.
Note: Other Diaphragm Materials are available as an option. Call our Sales Department for details.